Title:
WORK VEHICLE
Document Type and Number:
Japanese Patent JP2019066018
Kind Code:
A
Abstract:
To provide a work vehicle which makes a work speed hard to be reduced even in a case where combined control is performed in such a manner that the work vehicle executes work while traveling right and left traveling parts in the vicinity of a maximum speed.SOLUTION: A first hydraulic circuit 50a guides a working fluid from a hydraulic pump 34a to a hydraulic motor 22L and a first actuator (e.g., a first work machine 86). A second hydraulic circuit 50b guides a working fluid from a hydraulic pump 34b to a hydraulic motor 22R and a second actuator (e.g., a third work machine 88). The left and right hydraulic motors 22L and 22R drive left and right crawler traveling devices. In a case where both values of instruction signals corresponding to traveling speeds of the left and right crawler traveling devices instructed by left and right travel operation levers 36L and 36R are equal to or greater than a predetermined threshold, a confluence valve 70 is brought into a confluent state where the two hydraulic circuits 50a and 50b are connected and in the other case, the confluence valve is brought into a disconnected state where the two hydraulic circuits 50a and 50b are disconnected.SELECTED DRAWING: Figure 2
Inventors:
MATSUYAMA HIROSHI
KATSUKI HIDEHIKO
AOYAMA KAZUHISA
KATSUKI HIDEHIKO
AOYAMA KAZUHISA
Application Number:
JP2017194799A
Publication Date:
April 25, 2019
Filing Date:
October 05, 2017
Export Citation:
Assignee:
YANMAR CO LTD
International Classes:
F15B11/02; E02F9/22; F15B11/00; F15B11/17
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Foreign References:
| WO2014192458A1 | 2014-12-04 |
Attorney, Agent or Firm:
Naomi Katsura River